This little job is to facilitate the fitting of a DRO to the quill on my Warco WM40 turret mill, (bit like a Bridgeport)Newall make a fitting kit circa £200 which 'plugs into' the front facing centre hole. This hole is just over 6mm deep. , so I felt the fitting would not be very secure.The idea was to replace the standard knob with a version that had a flat front (for screwing into) and would bring the face forward a bit.A little bit of dismantling to get the old part out.1. Existing setup2. The old and the new3. New one in place, but omitting all the other bits...so far.Pete